2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-2000
5 Copyright (C) Jeremy Allison 1992-2006
6 Copyright (C) Volker Lendecke 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 12 aug 96: Erik.Devriendt@te6.siemens.be
24 added support for shared memory implementation of share mode locking
26 May 1997. Jeremy Allison (jallison@whistle.com). Modified share mode
27 locking to deal with multiple share modes per open file.
29 September 1997. Jeremy Allison (jallison@whistle.com). Added oplock
32 rewritten completely to use new tdb code. Tridge, Dec '99
34 Added POSIX locking support. Jeremy Allison (jeremy@valinux.com), Apr. 2000.
35 Added Unix Extensions POSIX locking support. Jeremy Allison Mar 2006.
39 #include "system/filesys.h"
40 #include "locking/proto.h"
41 #include "smbd/globals.h"
42 #include "dbwrap/dbwrap.h"
43 #include "dbwrap/dbwrap_open.h"
44 #include "../libcli/security/security.h"
48 #include "../librpc/gen_ndr/ndr_open_files.h"
51 #define DBGC_CLASS DBGC_LOCKING
53 #define NO_LOCKING_COUNT (-1)
55 /****************************************************************************
57 ****************************************************************************/
59 const char *lock_type_name(enum brl_type lock_type
)
66 case PENDING_READ_LOCK
:
67 return "PENDING_READ";
68 case PENDING_WRITE_LOCK
:
69 return "PENDING_WRITE";
75 const char *lock_flav_name(enum brl_flavour lock_flav
)
77 return (lock_flav
== WINDOWS_LOCK
) ? "WINDOWS_LOCK" : "POSIX_LOCK";
80 /****************************************************************************
81 Utility function called to see if a file region is locked.
82 Called in the read/write codepath.
83 ****************************************************************************/
85 void init_strict_lock_struct(files_struct
*fsp
,
89 enum brl_type lock_type
,
90 struct lock_struct
*plock
)
92 SMB_ASSERT(lock_type
== READ_LOCK
|| lock_type
== WRITE_LOCK
);
94 plock
->context
.smblctx
= smblctx
;
95 plock
->context
.tid
= fsp
->conn
->cnum
;
96 plock
->context
.pid
= messaging_server_id(fsp
->conn
->sconn
->msg_ctx
);
99 plock
->fnum
= fsp
->fnum
;
100 plock
->lock_type
= lock_type
;
101 plock
->lock_flav
= lp_posix_cifsu_locktype(fsp
);
104 bool strict_lock_default(files_struct
*fsp
, struct lock_struct
*plock
)
106 int strict_locking
= lp_strict_locking(fsp
->conn
->params
);
109 if (plock
->size
== 0) {
113 if (!lp_locking(fsp
->conn
->params
) || !strict_locking
) {
117 if (strict_locking
== Auto
) {
118 if (EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
) && (plock
->lock_type
== READ_LOCK
|| plock
->lock_type
== WRITE_LOCK
)) {
119 DEBUG(10,("is_locked: optimisation - exclusive oplock on file %s\n", fsp_str_dbg(fsp
)));
121 } else if ((fsp
->oplock_type
== LEVEL_II_OPLOCK
) &&
122 (plock
->lock_type
== READ_LOCK
)) {
123 DEBUG(10,("is_locked: optimisation - level II oplock on file %s\n", fsp_str_dbg(fsp
)));
126 struct byte_range_lock
*br_lck
;
128 br_lck
= brl_get_locks_readonly(fsp
);
132 ret
= brl_locktest(br_lck
,
133 plock
->context
.smblctx
,
141 struct byte_range_lock
*br_lck
;
143 br_lck
= brl_get_locks_readonly(fsp
);
147 ret
= brl_locktest(br_lck
,
148 plock
->context
.smblctx
,
156 DEBUG(10,("strict_lock_default: flavour = %s brl start=%.0f "
157 "len=%.0f %s for fnum %llu file %s\n",
158 lock_flav_name(plock
->lock_flav
),
159 (double)plock
->start
, (double)plock
->size
,
160 ret
? "unlocked" : "locked",
161 (unsigned long long)plock
->fnum
, fsp_str_dbg(fsp
)));
166 void strict_unlock_default(files_struct
*fsp
, struct lock_struct
*plock
)
170 /****************************************************************************
171 Find out if a lock could be granted - return who is blocking us if we can't.
172 ****************************************************************************/
174 NTSTATUS
query_lock(files_struct
*fsp
,
178 enum brl_type
*plock_type
,
179 enum brl_flavour lock_flav
)
181 struct byte_range_lock
*br_lck
= NULL
;
183 if (!fsp
->can_lock
) {
184 return fsp
->is_directory
? NT_STATUS_INVALID_DEVICE_REQUEST
: NT_STATUS_INVALID_HANDLE
;
187 if (!lp_locking(fsp
->conn
->params
)) {
191 br_lck
= brl_get_locks_readonly(fsp
);
193 return NT_STATUS_NO_MEMORY
;
196 return brl_lockquery(br_lck
,
198 messaging_server_id(fsp
->conn
->sconn
->msg_ctx
),
205 static void increment_current_lock_count(files_struct
*fsp
,
206 enum brl_flavour lock_flav
)
208 if (lock_flav
== WINDOWS_LOCK
&&
209 fsp
->current_lock_count
!= NO_LOCKING_COUNT
) {
210 /* blocking ie. pending, locks also count here,
211 * as this is an efficiency counter to avoid checking
212 * the lock db. on close. JRA. */
214 fsp
->current_lock_count
++;
216 /* Notice that this has had a POSIX lock request.
217 * We can't count locks after this so forget them.
219 fsp
->current_lock_count
= NO_LOCKING_COUNT
;
223 static void decrement_current_lock_count(files_struct
*fsp
,
224 enum brl_flavour lock_flav
)
226 if (lock_flav
== WINDOWS_LOCK
&&
227 fsp
->current_lock_count
!= NO_LOCKING_COUNT
) {
228 SMB_ASSERT(fsp
->current_lock_count
> 0);
229 fsp
->current_lock_count
--;
233 /****************************************************************************
234 Utility function called by locking requests.
235 ****************************************************************************/
237 struct byte_range_lock
*do_lock(struct messaging_context
*msg_ctx
,
242 enum brl_type lock_type
,
243 enum brl_flavour lock_flav
,
247 struct blocking_lock_record
*blr
)
249 struct byte_range_lock
*br_lck
= NULL
;
251 /* silently return ok on print files as we don't do locking there */
252 if (fsp
->print_file
) {
253 *perr
= NT_STATUS_OK
;
257 if (!fsp
->can_lock
) {
258 *perr
= fsp
->is_directory
? NT_STATUS_INVALID_DEVICE_REQUEST
: NT_STATUS_INVALID_HANDLE
;
262 if (!lp_locking(fsp
->conn
->params
)) {
263 *perr
= NT_STATUS_OK
;
267 /* NOTE! 0 byte long ranges ARE allowed and should be stored */
269 DEBUG(10,("do_lock: lock flavour %s lock type %s start=%.0f len=%.0f "
270 "blocking_lock=%s requested for %s file %s\n",
271 lock_flav_name(lock_flav
), lock_type_name(lock_type
),
272 (double)offset
, (double)count
, blocking_lock
? "true" :
273 "false", fsp_fnum_dbg(fsp
), fsp_str_dbg(fsp
)));
275 br_lck
= brl_get_locks(talloc_tos(), fsp
);
277 *perr
= NT_STATUS_NO_MEMORY
;
281 *perr
= brl_lock(msg_ctx
,
284 messaging_server_id(fsp
->conn
->sconn
->msg_ctx
),
293 DEBUG(10, ("do_lock: returning status=%s\n", nt_errstr(*perr
)));
295 increment_current_lock_count(fsp
, lock_flav
);
299 /****************************************************************************
300 Utility function called by unlocking requests.
301 ****************************************************************************/
303 NTSTATUS
do_unlock(struct messaging_context
*msg_ctx
,
308 enum brl_flavour lock_flav
)
311 struct byte_range_lock
*br_lck
= NULL
;
313 if (!fsp
->can_lock
) {
314 return fsp
->is_directory
? NT_STATUS_INVALID_DEVICE_REQUEST
: NT_STATUS_INVALID_HANDLE
;
317 if (!lp_locking(fsp
->conn
->params
)) {
321 DEBUG(10,("do_unlock: unlock start=%.0f len=%.0f requested for %s file %s\n",
322 (double)offset
, (double)count
, fsp_fnum_dbg(fsp
),
325 br_lck
= brl_get_locks(talloc_tos(), fsp
);
327 return NT_STATUS_NO_MEMORY
;
330 ok
= brl_unlock(msg_ctx
,
333 messaging_server_id(fsp
->conn
->sconn
->msg_ctx
),
341 DEBUG(10,("do_unlock: returning ERRlock.\n" ));
342 return NT_STATUS_RANGE_NOT_LOCKED
;
345 decrement_current_lock_count(fsp
, lock_flav
);
349 /****************************************************************************
350 Cancel any pending blocked locks.
351 ****************************************************************************/
353 NTSTATUS
do_lock_cancel(files_struct
*fsp
,
357 enum brl_flavour lock_flav
,
358 struct blocking_lock_record
*blr
)
361 struct byte_range_lock
*br_lck
= NULL
;
363 if (!fsp
->can_lock
) {
364 return fsp
->is_directory
?
365 NT_STATUS_INVALID_DEVICE_REQUEST
: NT_STATUS_INVALID_HANDLE
;
368 if (!lp_locking(fsp
->conn
->params
)) {
369 return NT_STATUS_DOS(ERRDOS
, ERRcancelviolation
);
372 DEBUG(10,("do_lock_cancel: cancel start=%.0f len=%.0f requested for %s file %s\n",
373 (double)offset
, (double)count
, fsp_fnum_dbg(fsp
),
376 br_lck
= brl_get_locks(talloc_tos(), fsp
);
378 return NT_STATUS_NO_MEMORY
;
381 ok
= brl_lock_cancel(br_lck
,
383 messaging_server_id(fsp
->conn
->sconn
->msg_ctx
),
392 DEBUG(10,("do_lock_cancel: returning ERRcancelviolation.\n" ));
393 return NT_STATUS_DOS(ERRDOS
, ERRcancelviolation
);
396 decrement_current_lock_count(fsp
, lock_flav
);
400 /****************************************************************************
401 Remove any locks on this fd. Called from file_close().
402 ****************************************************************************/
404 void locking_close_file(struct messaging_context
*msg_ctx
,
406 enum file_close_type close_type
)
408 struct byte_range_lock
*br_lck
;
410 if (!lp_locking(fsp
->conn
->params
)) {
414 /* If we have not outstanding locks or pending
415 * locks then we don't need to look in the lock db.
418 if (fsp
->current_lock_count
== 0) {
422 br_lck
= brl_get_locks(talloc_tos(),fsp
);
425 cancel_pending_lock_requests_by_fid(fsp
, br_lck
, close_type
);
426 brl_close_fnum(msg_ctx
, br_lck
);
431 /*******************************************************************
432 Print out a share mode.
433 ********************************************************************/
435 char *share_mode_str(TALLOC_CTX
*ctx
, int num
, const struct share_mode_entry
*e
)
437 return talloc_asprintf(ctx
, "share_mode_entry[%d]: "
438 "pid = %s, share_access = 0x%x, private_options = 0x%x, "
439 "access_mask = 0x%x, mid = 0x%llx, type= 0x%x, gen_id = %llu, "
440 "uid = %u, flags = %u, file_id %s, name_hash = 0x%x",
442 procid_str_static(&e
->pid
),
443 e
->share_access
, e
->private_options
,
444 e
->access_mask
, (unsigned long long)e
->op_mid
,
445 e
->op_type
, (unsigned long long)e
->share_file_id
,
446 (unsigned int)e
->uid
, (unsigned int)e
->flags
,
447 file_id_string_tos(&e
->id
),
448 (unsigned int)e
->name_hash
);
451 /*******************************************************************
452 Fetch a share mode where we know one MUST exist. This call reference
453 counts it internally to allow for nested lock fetches.
454 ********************************************************************/
456 struct share_mode_lock
*get_existing_share_mode_lock(TALLOC_CTX
*mem_ctx
,
457 const struct file_id id
)
459 return get_share_mode_lock(mem_ctx
, id
, NULL
, NULL
, NULL
);
462 /*******************************************************************
463 Sets the service name and filename for rename.
464 At this point we emit "file renamed" messages to all
465 process id's that have this file open.
466 Based on an initial code idea from SATOH Fumiyasu <fumiya@samba.gr.jp>
467 ********************************************************************/
469 bool rename_share_filename(struct messaging_context
*msg_ctx
,
470 struct share_mode_lock
*lck
,
471 const char *servicepath
,
472 uint32_t orig_name_hash
,
473 uint32_t new_name_hash
,
474 const struct smb_filename
*smb_fname_dst
)
476 struct share_mode_data
*d
= lck
->data
;
483 bool strip_two_chars
= false;
484 bool has_stream
= smb_fname_dst
->stream_name
!= NULL
;
486 DEBUG(10, ("rename_share_filename: servicepath %s newname %s\n",
487 servicepath
, smb_fname_dst
->base_name
));
490 * rename_internal_fsp() and rename_internals() add './' to
491 * head of newname if newname does not contain a '/'.
493 if (smb_fname_dst
->base_name
[0] &&
494 smb_fname_dst
->base_name
[1] &&
495 smb_fname_dst
->base_name
[0] == '.' &&
496 smb_fname_dst
->base_name
[1] == '/') {
497 strip_two_chars
= true;
500 d
->servicepath
= talloc_strdup(d
, servicepath
);
501 d
->base_name
= talloc_strdup(d
, smb_fname_dst
->base_name
+
502 (strip_two_chars
? 2 : 0));
503 d
->stream_name
= talloc_strdup(d
, smb_fname_dst
->stream_name
);
504 if (d
->base_name
== NULL
||
505 (has_stream
&& d
->stream_name
== NULL
) ||
506 d
->servicepath
== NULL
) {
507 DEBUG(0, ("rename_share_filename: talloc failed\n"));
512 sp_len
= strlen(d
->servicepath
);
513 bn_len
= strlen(d
->base_name
);
514 sn_len
= has_stream
? strlen(d
->stream_name
) : 0;
516 msg_len
= MSG_FILE_RENAMED_MIN_SIZE
+ sp_len
+ 1 + bn_len
+ 1 +
519 /* Set up the name changed message. */
520 frm
= talloc_array(d
, char, msg_len
);
525 push_file_id_24(frm
, &d
->id
);
527 DEBUG(10,("rename_share_filename: msg_len = %u\n", (unsigned int)msg_len
));
530 d
->servicepath
? d
->servicepath
: "",
532 strlcpy(&frm
[24 + sp_len
+ 1],
533 d
->base_name
? d
->base_name
: "",
535 strlcpy(&frm
[24 + sp_len
+ 1 + bn_len
+ 1],
536 d
->stream_name
? d
->stream_name
: "",
539 /* Send the messages. */
540 for (i
=0; i
<d
->num_share_modes
; i
++) {
541 struct share_mode_entry
*se
= &d
->share_modes
[i
];
542 if (!is_valid_share_mode_entry(se
)) {
546 /* If this is a hardlink to the inode
547 with a different name, skip this. */
548 if (se
->name_hash
!= orig_name_hash
) {
552 se
->name_hash
= new_name_hash
;
554 /* But not to ourselves... */
555 if (procid_is_me(&se
->pid
)) {
559 if (share_mode_stale_pid(d
, i
)) {
563 DEBUG(10,("rename_share_filename: sending rename message to "
564 "pid %s file_id %s sharepath %s base_name %s "
566 procid_str_static(&se
->pid
),
567 file_id_string_tos(&d
->id
),
568 d
->servicepath
, d
->base_name
,
569 has_stream
? d
->stream_name
: ""));
571 messaging_send_buf(msg_ctx
, se
->pid
, MSG_SMB_FILE_RENAME
,
572 (uint8
*)frm
, msg_len
);
578 void get_file_infos(struct file_id id
,
580 bool *delete_on_close
,
581 struct timespec
*write_time
)
583 struct share_mode_lock
*lck
;
585 if (delete_on_close
) {
586 *delete_on_close
= false;
590 ZERO_STRUCTP(write_time
);
593 if (!(lck
= fetch_share_mode_unlocked(talloc_tos(), id
))) {
597 if (delete_on_close
) {
598 *delete_on_close
= is_delete_on_close_set(lck
, name_hash
);
604 wt
= lck
->data
->changed_write_time
;
605 if (null_timespec(wt
)) {
606 wt
= lck
->data
->old_write_time
;
615 bool is_valid_share_mode_entry(const struct share_mode_entry
*e
)
619 num_props
+= ((e
->op_type
== NO_OPLOCK
) ? 1 : 0);
620 num_props
+= (EXCLUSIVE_OPLOCK_TYPE(e
->op_type
) ? 1 : 0);
621 num_props
+= (LEVEL_II_OPLOCK_TYPE(e
->op_type
) ? 1 : 0);
623 if ((num_props
> 1) && serverid_exists(&e
->pid
)) {
624 smb_panic("Invalid share mode entry");
626 return (num_props
!= 0);
629 bool is_deferred_open_entry(const struct share_mode_entry
*e
)
631 return (e
->op_type
== DEFERRED_OPEN_ENTRY
);
635 * In case d->share_modes[i] conflicts with something or otherwise is
636 * being used, we need to make sure the corresponding process still
637 * exists. This routine checks it and potentially removes the entry
638 * from d->share_modes. Modifies d->num_share_modes, watch out in
639 * routines iterating over that array.
641 bool share_mode_stale_pid(struct share_mode_data
*d
, unsigned i
)
643 struct share_mode_entry
*e
;
645 if (i
> d
->num_share_modes
) {
646 DEBUG(1, ("Asking for index %u, only %u around\n",
647 i
, (unsigned)d
->num_share_modes
));
650 e
= &d
->share_modes
[i
];
651 if (serverid_exists(&e
->pid
)) {
652 DEBUG(10, ("PID %s (index %u out of %u) still exists\n",
653 procid_str_static(&e
->pid
), i
,
654 (unsigned)d
->num_share_modes
));
657 DEBUG(10, ("PID %s (index %u out of %u) does not exist anymore\n",
658 procid_str_static(&e
->pid
), i
,
659 (unsigned)d
->num_share_modes
));
660 *e
= d
->share_modes
[d
->num_share_modes
-1];
661 d
->num_share_modes
-= 1;
663 if (d
->num_share_modes
== 0 &&
664 d
->num_delete_tokens
) {
666 * We cannot have any delete tokens
667 * if there are no valid share modes.
669 TALLOC_FREE(d
->delete_tokens
);
670 d
->num_delete_tokens
= 0;
677 /*******************************************************************
678 Fill a share mode entry.
679 ********************************************************************/
681 static void fill_share_mode_entry(struct share_mode_entry
*e
,
683 uid_t uid
, uint64_t mid
, uint16 op_type
)
686 e
->pid
= messaging_server_id(fsp
->conn
->sconn
->msg_ctx
);
687 e
->share_access
= fsp
->share_access
;
688 e
->private_options
= fsp
->fh
->private_options
;
689 e
->access_mask
= fsp
->access_mask
;
691 e
->op_type
= op_type
;
692 e
->time
.tv_sec
= fsp
->open_time
.tv_sec
;
693 e
->time
.tv_usec
= fsp
->open_time
.tv_usec
;
694 e
->id
= fsp
->file_id
;
695 e
->share_file_id
= fsp
->fh
->gen_id
;
696 e
->uid
= (uint32
)uid
;
697 e
->flags
= fsp
->posix_open
? SHARE_MODE_FLAG_POSIX_OPEN
: 0;
698 e
->name_hash
= fsp
->name_hash
;
701 static void fill_deferred_open_entry(struct share_mode_entry
*e
,
702 const struct timeval request_time
,
704 struct server_id pid
,
710 e
->op_type
= DEFERRED_OPEN_ENTRY
;
711 e
->time
.tv_sec
= request_time
.tv_sec
;
712 e
->time
.tv_usec
= request_time
.tv_usec
;
718 static void add_share_mode_entry(struct share_mode_data
*d
,
719 const struct share_mode_entry
*entry
)
721 ADD_TO_ARRAY(d
, struct share_mode_entry
, *entry
,
722 &d
->share_modes
, &d
->num_share_modes
);
726 void set_share_mode(struct share_mode_lock
*lck
, files_struct
*fsp
,
727 uid_t uid
, uint64_t mid
, uint16 op_type
)
729 struct share_mode_entry entry
;
730 fill_share_mode_entry(&entry
, fsp
, uid
, mid
, op_type
);
731 add_share_mode_entry(lck
->data
, &entry
);
734 void add_deferred_open(struct share_mode_lock
*lck
, uint64_t mid
,
735 struct timeval request_time
,
736 struct server_id pid
, struct file_id id
)
738 struct share_mode_entry entry
;
739 fill_deferred_open_entry(&entry
, request_time
, id
, pid
, mid
);
740 add_share_mode_entry(lck
->data
, &entry
);
743 /*******************************************************************
744 Check if two share mode entries are identical, ignoring oplock
745 and mid info and desired_access. (Removed paranoia test - it's
746 not automatically a logic error if they are identical. JRA.)
747 ********************************************************************/
749 static bool share_modes_identical(struct share_mode_entry
*e1
,
750 struct share_mode_entry
*e2
)
752 /* We used to check for e1->share_access == e2->share_access here
753 as well as the other fields but 2 different DOS or FCB opens
754 sharing the same share mode entry may validly differ in
755 fsp->share_access field. */
757 return (procid_equal(&e1
->pid
, &e2
->pid
) &&
758 file_id_equal(&e1
->id
, &e2
->id
) &&
759 e1
->share_file_id
== e2
->share_file_id
);
762 static bool deferred_open_identical(struct share_mode_entry
*e1
,
763 struct share_mode_entry
*e2
)
765 return (procid_equal(&e1
->pid
, &e2
->pid
) &&
766 (e1
->op_mid
== e2
->op_mid
) &&
767 file_id_equal(&e1
->id
, &e2
->id
));
770 static struct share_mode_entry
*find_share_mode_entry(struct share_mode_data
*d
,
771 struct share_mode_entry
*entry
)
775 for (i
=0; i
<d
->num_share_modes
; i
++) {
776 struct share_mode_entry
*e
= &d
->share_modes
[i
];
777 if (is_valid_share_mode_entry(entry
) &&
778 is_valid_share_mode_entry(e
) &&
779 share_modes_identical(e
, entry
)) {
782 if (is_deferred_open_entry(entry
) &&
783 is_deferred_open_entry(e
) &&
784 deferred_open_identical(e
, entry
)) {
791 /*******************************************************************
792 Del the share mode of a file for this process. Return the number of
794 ********************************************************************/
796 bool del_share_mode(struct share_mode_lock
*lck
, files_struct
*fsp
)
798 struct share_mode_entry entry
, *e
;
800 /* Don't care about the pid owner being correct here - just a search. */
801 fill_share_mode_entry(&entry
, fsp
, (uid_t
)-1, 0, NO_OPLOCK
);
803 e
= find_share_mode_entry(lck
->data
, &entry
);
807 *e
= lck
->data
->share_modes
[lck
->data
->num_share_modes
-1];
808 lck
->data
->num_share_modes
-= 1;
809 lck
->data
->modified
= True
;
813 void del_deferred_open_entry(struct share_mode_lock
*lck
, uint64_t mid
,
814 struct server_id pid
)
816 struct share_mode_entry entry
, *e
;
818 fill_deferred_open_entry(&entry
, timeval_zero(),
819 lck
->data
->id
, pid
, mid
);
821 e
= find_share_mode_entry(lck
->data
, &entry
);
825 *e
= lck
->data
->share_modes
[lck
->data
->num_share_modes
-1];
826 lck
->data
->num_share_modes
-= 1;
827 lck
->data
->modified
= True
;
830 /*******************************************************************
831 Remove an oplock mid and mode entry from a share mode.
832 ********************************************************************/
834 bool remove_share_oplock(struct share_mode_lock
*lck
, files_struct
*fsp
)
836 struct share_mode_entry entry
, *e
;
838 /* Don't care about the pid owner being correct here - just a search. */
839 fill_share_mode_entry(&entry
, fsp
, (uid_t
)-1, 0, NO_OPLOCK
);
841 e
= find_share_mode_entry(lck
->data
, &entry
);
846 if (EXCLUSIVE_OPLOCK_TYPE(e
->op_type
)) {
848 * Going from exclusive or batch,
849 * we always go through FAKE_LEVEL_II
852 if (!EXCLUSIVE_OPLOCK_TYPE(fsp
->oplock_type
)) {
853 smb_panic("remove_share_oplock: logic error");
855 e
->op_type
= FAKE_LEVEL_II_OPLOCK
;
857 e
->op_type
= NO_OPLOCK
;
859 lck
->data
->modified
= True
;
863 /*******************************************************************
864 Downgrade a oplock type from exclusive to level II.
865 ********************************************************************/
867 bool downgrade_share_oplock(struct share_mode_lock
*lck
, files_struct
*fsp
)
869 struct share_mode_entry entry
, *e
;
871 /* Don't care about the pid owner being correct here - just a search. */
872 fill_share_mode_entry(&entry
, fsp
, (uid_t
)-1, 0, NO_OPLOCK
);
874 e
= find_share_mode_entry(lck
->data
, &entry
);
879 e
->op_type
= LEVEL_II_OPLOCK
;
880 lck
->data
->modified
= True
;
884 /*************************************************************************
885 Return a talloced copy of a struct security_unix_token. NULL on fail.
886 (Should this be in locking.c.... ?).
887 *************************************************************************/
889 static struct security_unix_token
*copy_unix_token(TALLOC_CTX
*ctx
, const struct security_unix_token
*tok
)
891 struct security_unix_token
*cpy
;
893 cpy
= talloc(ctx
, struct security_unix_token
);
900 cpy
->ngroups
= tok
->ngroups
;
902 /* Make this a talloc child of cpy. */
903 cpy
->groups
= (gid_t
*)talloc_memdup(
904 cpy
, tok
->groups
, tok
->ngroups
* sizeof(gid_t
));
913 /****************************************************************************
914 Adds a delete on close token.
915 ****************************************************************************/
917 static bool add_delete_on_close_token(struct share_mode_data
*d
,
919 const struct security_token
*nt_tok
,
920 const struct security_unix_token
*tok
)
922 struct delete_token
*tmp
, *dtl
;
924 tmp
= talloc_realloc(d
, d
->delete_tokens
, struct delete_token
,
925 d
->num_delete_tokens
+1);
929 d
->delete_tokens
= tmp
;
930 dtl
= &d
->delete_tokens
[d
->num_delete_tokens
];
932 dtl
->name_hash
= name_hash
;
933 dtl
->delete_nt_token
= dup_nt_token(d
->delete_tokens
, nt_tok
);
934 if (dtl
->delete_nt_token
== NULL
) {
937 dtl
->delete_token
= copy_unix_token(d
->delete_tokens
, tok
);
938 if (dtl
->delete_token
== NULL
) {
941 d
->num_delete_tokens
+= 1;
946 /****************************************************************************
947 Sets the delete on close flag over all share modes on this file.
948 Modify the share mode entry for all files open
949 on this device and inode to tell other smbds we have
950 changed the delete on close flag. This will be noticed
951 in the close code, the last closer will delete the file
953 This makes a copy of any struct security_unix_token into the
954 lck entry. This function is used when the lock is already granted.
955 ****************************************************************************/
957 void set_delete_on_close_lck(files_struct
*fsp
,
958 struct share_mode_lock
*lck
,
959 bool delete_on_close
,
960 const struct security_token
*nt_tok
,
961 const struct security_unix_token
*tok
)
963 struct share_mode_data
*d
= lck
->data
;
967 if (delete_on_close
) {
968 SMB_ASSERT(nt_tok
!= NULL
);
969 SMB_ASSERT(tok
!= NULL
);
971 SMB_ASSERT(nt_tok
== NULL
);
972 SMB_ASSERT(tok
== NULL
);
975 for (i
=0; i
<d
->num_delete_tokens
; i
++) {
976 struct delete_token
*dt
= &d
->delete_tokens
[i
];
977 if (dt
->name_hash
== fsp
->name_hash
) {
979 if (delete_on_close
== false) {
980 /* Delete this entry. */
981 TALLOC_FREE(dt
->delete_nt_token
);
982 TALLOC_FREE(dt
->delete_token
);
983 *dt
= d
->delete_tokens
[
984 d
->num_delete_tokens
-1];
985 d
->num_delete_tokens
-= 1;
987 /* Replace this token with the
989 TALLOC_FREE(dt
->delete_nt_token
);
990 dt
->delete_nt_token
= dup_nt_token(dt
, nt_tok
);
991 SMB_ASSERT(dt
->delete_nt_token
!= NULL
);
992 TALLOC_FREE(dt
->delete_token
);
993 dt
->delete_token
= copy_unix_token(dt
, tok
);
994 SMB_ASSERT(dt
->delete_token
!= NULL
);
1000 if (!delete_on_close
) {
1001 /* Nothing to delete - not found. */
1005 ret
= add_delete_on_close_token(lck
->data
, fsp
->name_hash
, nt_tok
, tok
);
1009 bool set_delete_on_close(files_struct
*fsp
, bool delete_on_close
,
1010 const struct security_token
*nt_tok
,
1011 const struct security_unix_token
*tok
)
1013 struct share_mode_lock
*lck
;
1015 DEBUG(10,("set_delete_on_close: %s delete on close flag for "
1017 delete_on_close
? "Adding" : "Removing", fsp_fnum_dbg(fsp
),
1020 lck
= get_existing_share_mode_lock(talloc_tos(), fsp
->file_id
);
1025 if (delete_on_close
) {
1026 set_delete_on_close_lck(fsp
, lck
, true,
1030 set_delete_on_close_lck(fsp
, lck
, false,
1035 if (fsp
->is_directory
) {
1036 SMB_ASSERT(!is_ntfs_stream_smb_fname(fsp
->fsp_name
));
1037 send_stat_cache_delete_message(fsp
->conn
->sconn
->msg_ctx
,
1038 fsp
->fsp_name
->base_name
);
1043 fsp
->delete_on_close
= delete_on_close
;
1048 static struct delete_token
*find_delete_on_close_token(
1049 struct share_mode_data
*d
, uint32_t name_hash
)
1053 DEBUG(10, ("find_delete_on_close_token: name_hash = 0x%x\n",
1054 (unsigned int)name_hash
));
1056 for (i
=0; i
<d
->num_delete_tokens
; i
++) {
1057 struct delete_token
*dt
= &d
->delete_tokens
[i
];
1059 DEBUG(10, ("find__delete_on_close_token: dt->name_hash = 0x%x\n",
1060 (unsigned int)dt
->name_hash
));
1061 if (dt
->name_hash
== name_hash
) {
1068 /****************************************************************************
1069 Return the NT token and UNIX token if there's a match. Return true if
1070 found, false if not.
1071 ****************************************************************************/
1073 bool get_delete_on_close_token(struct share_mode_lock
*lck
,
1075 const struct security_token
**pp_nt_tok
,
1076 const struct security_unix_token
**pp_tok
)
1078 struct delete_token
*dt
;
1080 dt
= find_delete_on_close_token(lck
->data
, name_hash
);
1084 *pp_nt_tok
= dt
->delete_nt_token
;
1085 *pp_tok
= dt
->delete_token
;
1089 bool is_delete_on_close_set(struct share_mode_lock
*lck
, uint32_t name_hash
)
1091 return find_delete_on_close_token(lck
->data
, name_hash
) != NULL
;
1094 bool set_sticky_write_time(struct file_id fileid
, struct timespec write_time
)
1096 struct share_mode_lock
*lck
;
1098 DEBUG(5,("set_sticky_write_time: %s id=%s\n",
1099 timestring(talloc_tos(),
1100 convert_timespec_to_time_t(write_time
)),
1101 file_id_string_tos(&fileid
)));
1103 lck
= get_existing_share_mode_lock(talloc_tos(), fileid
);
1108 if (timespec_compare(&lck
->data
->changed_write_time
, &write_time
) != 0) {
1109 lck
->data
->modified
= True
;
1110 lck
->data
->changed_write_time
= write_time
;
1117 bool set_write_time(struct file_id fileid
, struct timespec write_time
)
1119 struct share_mode_lock
*lck
;
1121 DEBUG(5,("set_write_time: %s id=%s\n",
1122 timestring(talloc_tos(),
1123 convert_timespec_to_time_t(write_time
)),
1124 file_id_string_tos(&fileid
)));
1126 lck
= get_existing_share_mode_lock(talloc_tos(), fileid
);
1131 if (timespec_compare(&lck
->data
->old_write_time
, &write_time
) != 0) {
1132 lck
->data
->modified
= True
;
1133 lck
->data
->old_write_time
= write_time
;